1 // SPDX-License-Identifier: GPL-2.0
14 #include "dw-i3c-master.h"
16 /* AST2600-specific global register set */
53 static int ast2600_i3c_pullup_to_reg(unsigned int ohms, u32 *regp)  in ast2600_i3c_pullup_to_reg()  argument
57 	switch (ohms) {  in ast2600_i3c_pullup_to_reg()
68 		return -EINVAL;  in ast2600_i3c_pullup_to_reg()
83 	/* reg0: set SDA pullup values */  in ast2600_i3c_init()
84 	rc = ast2600_i3c_pullup_to_reg(i3c->sda_pullup, &reg);  in ast2600_i3c_init()
88 	rc = regmap_write(i3c->global_regs,  in ast2600_i3c_init()
89 			  AST2600_I3CG_REG0(i3c->global_idx), reg);  in ast2600_i3c_init()
96 	reg = AST2600_I3CG_REG1_INST_ID(i3c->global_idx);  in ast2600_i3c_init()
97 	rc = regmap_write(i3c->global_regs,  in ast2600_i3c_init()
98 			  AST2600_I3CG_REG1(i3c->global_idx), reg);  in ast2600_i3c_init()
108 	 * The ast2600 i3c controller will lock up on receiving 4n+1-byte IBIs  in ast2600_i3c_set_dat_ibi()
113 	if (enable && dev->info.bcr & I3C_BCR_IBI_PAYLOAD) {  in ast2600_i3c_set_dat_ibi()
114 		dev_warn_once(&i3c->base.dev,  in ast2600_i3c_set_dat_ibi()
127 	struct device_node *np = pdev->dev.of_node;  in ast2600_i3c_probe()
132 	i3c = devm_kzalloc(&pdev->dev, sizeof(*i3c), GFP_KERNEL);  in ast2600_i3c_probe()
134 		return -ENOMEM;  in ast2600_i3c_probe()
136 	rc = of_parse_phandle_with_fixed_args(np, "aspeed,global-regs", 1, 0,  in ast2600_i3c_probe()
139 		return -ENODEV;  in ast2600_i3c_probe()
141 	i3c->global_regs = syscon_node_to_regmap(gspec.np);  in ast2600_i3c_probe()
144 	if (IS_ERR(i3c->global_regs))  in ast2600_i3c_probe()
145 		return PTR_ERR(i3c->global_regs);  in ast2600_i3c_probe()
147 	i3c->global_idx = gspec.args[0];  in ast2600_i3c_probe()
149 	rc = of_property_read_u32(np, "sda-pullup-ohms", &i3c->sda_pullup);  in ast2600_i3c_probe()
151 		i3c->sda_pullup = AST2600_DEFAULT_SDA_PULLUP_OHMS;  in ast2600_i3c_probe()
153 	rc = ast2600_i3c_pullup_to_reg(i3c->sda_pullup, NULL);  in ast2600_i3c_probe()
155 		dev_err(&pdev->dev, "invalid sda-pullup value %d\n",  in ast2600_i3c_probe()
156 			i3c->sda_pullup);  in ast2600_i3c_probe()
158 	i3c->dw.platform_ops = &ast2600_i3c_ops;  in ast2600_i3c_probe()
159 	i3c->dw.ibi_capable = true;  in ast2600_i3c_probe()
160 	return dw_i3c_common_probe(&i3c->dw, pdev);  in ast2600_i3c_probe()
171 	{ .compatible = "aspeed,ast2600-i3c", },
180 		.name = "ast2600-i3c-master",